I've been increasingly disappointed with 30hp on my 420. With four adults, dog and gear on board it becomes very sluggish managing 20-22 knots flat out (on a water skiing section of the Trent). It went up on the plane ok but not without effort. The WOT revs were low so I was looking to get a four blade prop but instead I've secured a second hand replacement engine with zero hours, a 40hp Mercury EFI which I will fit when we get back from our hols in Lymington.
If anyone wants a full service history 2012 Mercury 30 with approx 150 hours, batteryless fuel injection with stainless prop them please let me know. Happy to demonstrate anytime in the next few weeks. It is having a Mercury dealer service on Tuesday before we go.
Regarding fuel economy this is admittedly brilliant. 8 hours continuous usage never took more than 24 litres to refill the tank. I figure that I'll now need to carry a spare tank to top up but hopefully if the loading and conditions are the same then the difference between 526cc and 748cc will be minimal. It won't be bank breaking if we only use the boat 20 times a year anyway.
